Tool holster



FIG. 1 is a top right front perspective view of a tool holster showing my new design, a typical step ladder upon which it may be mounted is shown in dashed lines and forms no part of my design;

FIG. 2 is a top left front perspective view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a top view thereof with the bottom view being a mirror image. 

The ornamental design for a tool holster, as shown and described. 